New posts in Upsert

MySQL behavior of ON DUPLICATE KEY UPDATE for multiple UNIQUE fields

SQLite UPSERT / UPDATE OR INSERT

How to update and upsert multiple documents in MongoDB using C# Drivers

How to Perform an UPSERT so that I can use both new and old values in update part

Find or insert based on unique key with Hibernate

Upsert in Rails ActiveRecord

Insert into a MySQL table or update if exists

INSERT IF NOT EXISTS ELSE UPDATE?

SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)

How do I update if exists, insert if not (AKA "upsert" or "merge") in MySQL?